Filter
Top Products
54
Appendix B
Voice communications
The chapter shows you the concept and command to help you configure your VoIP gateway through
sample configuration. And provide several ways to make calls to desired destination in
VIP-480/VIP-880. In this section, we’ll lead you step by step to establish your first voice communication
via web browsers operations.
Concepts: Voice Port
There are two type of the voice port, FXO (Foreign exchange Office) and FXS. (Foreign exchange
Station) On the printing of the RJ-11 port, you should find that.
FXO (Foreign exchange Office) port
The FXO port allows the connection with a device that already has a fixed number; say 222, or
412-1111. So the only connections for FXO port will be to your local PSTN or one of your extension-line
from your PBX system.
With your FXO connect to PSTN; the Internet Voice can then have a local call through this line/number
(412-1111). Or, locally, you can have an Internet Call through the line 412-1111
The same to PBX system, you are required to know with which extension number to the FXO port. Your
PBX users will need to know this number in the future.
Hint
FXO port cannot connect to an end-
node like telephone or fax machine (since
they do not pro
vide a number!). If you connect those to FXO port, you will hear
nothing once you pick up the handset.
FXO
412
-
1111
222